Analytical phytoplankton carbon measurements spanning diverse ecosystems
Analytical phytoplankton carbon measurements spanning diverse ecosystems
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DOI：
10.1016/j.dsr.2015.04.006
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发表时间：
2015-08-01
影响因子：
2.4
通讯作者：
Behrenfeld, Michael J.
中科院分区：
文献类型：
--
作者：
Graff, Jason R.;Westberry, Toby K.;Behrenfeld, Michael J.
浮游植物碳（C-phyto）的测量一直是海洋学长期追求但难以实现的目标。Cot的代理测量值。在过去已经被采用，但受到许多混淆的影响，破坏了他们的准确性。在这里，我们报告的第一个直接测量的C-phyto值从开放的海洋。C植物从太平洋和大西洋贫营养环流、赤道上升流系统到温带春季条件等各种环境中收集了样本。当与早期的代理相比，直接测量的C-phyto表现出最强的颗粒后向散射系数（B（bp））（R-2=0.69）的关系。叶绿素浓度和总颗粒有机碳（POC）浓度占相似的20%，减少变异性比B（bp）的C-phyto叶绿素a跨越一个数量级移动跨和不同的生态系统。同样，C-植物：POC的比例是可变的，最低值来自生产性温带沃茨和最高的贫营养环流。C-phyto和B（bp）之间的密切关系是特别重要的，因为bhp是一个属性从卫星海洋颜色测量检索。因此，我们的研究结果对于从空间对植物浮游生物进行全球监测是非常令人鼓舞的。继续应用我们的Coy。测量方法将能够验证卫星检索，并有助于更好地了解浮游植物生物量和生理学的环境控制。(C)2015作者爱思唯尔有限公司出版
The measurement of phytoplankton carbon (C-phyto) in the field has been a long-sought but elusive goal in oceanography. Proxy measurements of Cot,. have been employed in the past, but are subject to many confounding influences that undermine their accuracy. Here we report the first directly measured C-phyto values from the open ocean. The C-phyto. samples were collected from a diversity of environments, ranging from Pacific and Atlantic oligotrophic gyres to equatorial upwelling systems to temperate spring conditions. When compared to earlier proxies, direct measurements of C-phyto exhibit the strongest relationship with particulate backscattering coefficients (b(bp)) (R-2=0.69). Chlorophyll concentration and total particulate organic carbon (POC) concentration accounted for similar to 20% less variability in C-phyto than b(bp) Ratios of C-phyto to Chl a span an order of magnitude moving across and within distinct ecosystems. Similarly, C-phyto:POC ratios were variable with the lowest values coming from productive temperate waters and the highest from oligotrophic gyres. A strong relationship between C-phyto and b(bp) is particularly significant because bhp is a property retrievable from satellite ocean color measurements. Our results, therefore, are highly encouraging for the global monitoring of phytoplanIcton biomass from space. The continued application of our Coy. measurement approach will enable validation of satellite retrievals and contribute to an improved understanding of environmental controls on phytoplankton biomass and physiology. (C) 2015 The Authors. Published by Elsevier Ltd.